I pick this amp from jax a while back... Here are the specs..
Type: AXTU600C Tube 600 Watts Class A Car Audio Amplifier
Total RMS Power: 600W, Dynamic power 1200W
RMS Power: 165W x 2 @ 4 Ohms RMS
RMS Power: 300W x 2 @ 2 Ohms RMS
RMS Power: 600W x 1 @ 4 Ohms Bridged RMS
Bridgeable: Yes
Fuses: None
Efficiency: 70% @ 4 Ohms, 65% @ 2 Ohms
Crossover Control: High-Pass 50-500Hz, 12dB / Octave Butterworth
Crossover Control: Low-Pass 50-250Hz, 24dB / Octave Butterworth
signal In: Low Level 1 rca Pair
power Connector: Block / 1AWG
speaker Connector: Screw Terminal Barrier Strip 8-18 AWG
Heatsink Type: Aluminium
Cooling: Convection
Remote Control: Yes
Indicators: Power, Protect
Class: Tube A/B
Frequency Response: 20Hz-20KHz +/- 1dB
Weight: 7KG
Dimensions: 69 x 280 x 409 mm